criterion: cuprate-cryptonight

[hinto-janai]

What

Adds Criterion benchmarks for cuprate-cryptonight in benches/criterion/cuprate-cryptonight.

Requires #196

[hinto-janai]

Initial results.

Benchmark naming scheme: format!("{hash_fn_name}_{}", input.len())

E.g. cuprate_cryptonight::cryptonight_hash_v0(&[0; 8]) is v0_8.

benchmark	average time per call
r_8	57.091 ms
r_64	58.804 ms
r_512	58.892 ms
r_4096	58.645 ms
r_65536	58.925 ms
v0_8	25.941 ms
v0_64	26.790 ms
v0_512	26.750 ms
v0_4096	26.300 ms
v0_65536	26.787 ms
v1_8	3.4884 ns
v1_64	26.920 ms
v1_512	26.406 ms
v1_4096	26.896 ms
v1_65536	27.092 ms
v2_64	28.900 ms
v2_512	29.331 ms
v2_4096	28.683 ms
v2_65536	29.345 ms